[Bug c++/97051] Evaluating is_constant_evaluated in requires clause fails

[cvs-commit at gcc dot gnu.org via Gcc-bugs]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=97051

--- Comment #5 from CVS Commits <cvs-commit at gcc dot gnu.org> ---
The releases/gcc-10 branch has been updated by Patrick Palka
<ppa...@gcc.gnu.org>:

https://gcc.gnu.org/g:0c89b88daa8dffb956c77b4f22e914f42757f707

commit r10-9745-g0c89b88daa8dffb956c77b4f22e914f42757f707
Author: Patrick Palka <ppa...@redhat.com>
Date:   Sat Sep 19 11:17:41 2020 -0400

    c++: std::is_constant_evaluated inside constraint [PR97051]

    According to [expr.const]/14, the result of substitution into an atomic
    constraint is manifestly constant-evaluated; this patch adjusts the call
    to maybe_constant_value in satisfy_atom to that effect.

    gcc/cp/ChangeLog:

            PR c++/97051
            * constraint.cc (satisfy_atom): Pass true as the
            manifestly_const_eval argument to maybe_constant_value.

    gcc/testsuite/ChangeLog:

            PR c++/97051
            * g++.dg/cpp2a/is-constant-evaluated11.C: New test.

    (cherry picked from commit dea470d09155f2007bdd502c16614128cb6f9348)